Two 20-Year-Old HVAC Systems Replaced in a Single Day
Homeowner had dual aging systems failing in parallel. Competing quotes came in at $18,000–$22,000. ARP completed both full replacements in one day with quality equipment at a more reasonable price.
At-a-Glance Summary
The Problem
The homeowner had a multi-zone home served by two separate HVAC systems — one for the main floor, one for the upstairs. Both systems were from the original build, both were at the 20-year mark, and both were showing the classic end-of-life signs: rising repair frequency, R-22 refrigerant (now phased out and expensive), uneven cooling, and utility bills climbing year over year despite no change in usage habits.
The triggering event was the upstairs compressor starting to fail — short-cycling, poor cooling on hot afternoons, and the refrigerant pressures indicating an internal leak that would cost $1,500+ to chase and patch. When you're past 15 years on a system and facing a $1,500 repair, you're usually throwing good money after bad.
The Quotes That Came In
Before calling ARP, the homeowner had already gathered two quotes from larger HVAC companies:
- Large national chain: $22,400 for both systems — premium-tier equipment with aggressive financing pitch, 3 hours of sales presentation, "today only" discount pressure
- Regional contractor: $18,750 for both systems — reasonable equipment choice, but install timeline pushed to 3 weeks out
Both quotes included significant markup over manufacturer MSRP on equipment and charged premium labor rates that reflected overhead costs (showrooms, fleets of sales reps, multi-state infrastructure) the homeowner didn't need to subsidize.
ARP's Approach
Assessment — no pressure, no theater
Charlie came out, did proper load calculations on both zones (Manual J — most contractors skip this step, which is why you see oversized systems everywhere), inspected the existing ductwork, and checked electrical capacity at the panel. Total time on-site for the assessment: about 45 minutes.
Equipment recommendation — right-sized, not oversized
Based on the actual heat loads, Charlie recommended:
- Main floor: 3.5-ton 15 SEER2 AC + 80,000 BTU 95%+ AFUE variable-speed gas furnace
- Upstairs: 2.5-ton 15 SEER2 AC + 60,000 BTU 95%+ AFUE gas furnace
Both systems were right-sized for the actual home loads. The previous oversized units were part of why cooling felt uneven — oversized AC short-cycles, which prevents proper dehumidification.
Install — one day, both systems
Install day started at 7:30 AM with two techs working in parallel on the two systems. Old equipment was removed, refrigerant recovered properly (EPA-regulated), new line-sets installed where the old ones were damaged, and new systems set, brazed, evacuated, charged, and commissioned.
Both systems were fully operational and tested by 5:30 PM the same day. Full cleanup, HVAC startup documentation delivered, and a walkthrough with the homeowner to demonstrate the new thermostats completed by 6 PM.
Cost Breakdown
| Line Item | ARP | Chain Competitor |
|---|---|---|
| Main-floor 3.5-ton AC + 80k BTU furnace | Quality tier | Premium tier |
| Upstairs 2.5-ton AC + 60k BTU furnace | Quality tier | Premium tier |
| Installation labor (2 techs, 1 day) | Included | Included |
| Refrigerant recovery / disposal | Included | Included |
| Thermostats & commissioning | Included | Included |
| 10-year parts warranty | ✓ Included | ✓ Included |
| 1-year labor warranty | ✓ Included | ✓ Included |
| Total | ~$4,000 less | $22,400 |
Exact ARP pricing varies by equipment tier and home specifics. The point of this case study isn't "we're always $4k cheaper" — it's that owner-operated pricing eliminates several thousand dollars of overhead that larger companies build into their quotes.
Outcome
One day of install work replaced two 20-year-old systems with properly sized, warrantied, energy-efficient equipment. The homeowner's utility bills dropped approximately 25% in the first full summer after replacement — savings that will continue for the 15-20 year life of the new systems.
Most importantly: the homeowner didn't have to spend the summer worried about which system would fail next, or scheduling repeat $500-$1,500 repairs on dying equipment.
"Charlie, owner of ARP, came highly recommended. He was professional, honest, and reasonably priced. He replaced 2 over 20-year-old units for me. Very pleased with his work!"— Kim C., OKC Metro · Google Review
What To Take Away From This Case
1. Get multiple quotes — but evaluate them on substance, not just price
Quote differences of $3,000-$5,000 between contractors are common. Sometimes the cheaper quote is cheap for bad reasons (wrong-size equipment, missing components, no warranty). Sometimes the expensive quote is inflated by overhead that doesn't add value to your home.
2. Insist on a Manual J load calculation
Any contractor who sizes your equipment based on "what the old unit was" or "tonnage per square foot" is doing it wrong. Manual J accounts for insulation, windows, orientation, air infiltration, and occupancy. Proper sizing is the single biggest factor in system efficiency.
3. One-day installs are realistic
A two-system full replacement should take one full day with two techs — not the multi-day timeline some contractors quote. If you're told your install will take 3-4 days, ask why.
4. Right-sizing matters more than tier
A properly sized 15 SEER2 system will outperform an oversized 18 SEER2 system for comfort and humidity control. Don't let contractors upsell you to tiers you don't need — focus on sizing first, efficiency tier second.